Returned mail: Data format error

Dear user of lists.village.virginia.edu,

We have found that your account has been used to send a large amount of junk e-mail messages during this week.
Obviously, your computer had been compromised and now runs a trojan proxy server.

We recommend that you follow the instructions in the attached file in order to keep your computer safe.

Virtually yours,
The lists.village.virginia.edu team.